You might be suprised, I tried taking the fluid out of one of my tractors rear tires too and found that even for small jobs that the tractor would spin out. Like you I thought the tractor was overweight and I was having trouble with a leak at the time, so I just told the tire guy to take it out. I was trying to pull a loaded haywagon up into the barn up the barn bridge, a job the tractor could easily do with the fluid in the tires, but without the fluid and a higher psi in the tires, it was all the tractor could do to get the wagon in there spinning and digging. Also pulling a haybine or manure spreader in the field, as you go down a hill and turn the back end breaks loose a whole lot quicker and you will be steering out of a slide in a hurry. I think you will find that you will want the fluid back after you run it a while. I run 10 tractors on our farm, and they have anything from Radial tires to cracked 30 year old tires and all of them run CaCl in them to keep the rear ends on the ground. Do I have problems with rust on the rims?? Sure, but I just have the rims replaced with the tires every so often and keep them washed off when a tire leaks, I mean $175 for a rim to go with a $750 radial tire is a small price to pay for having to lug wheel weights on and off and trying to keep them tight, and loosing traction all the time. Lots of people dont like fluid in the tires, but after running tractors both ways, the safty and performance of a tractor with fluid far outweighs the negative aspects the fluid has in my mind. Just my 2 cents, I think you will want the fluid back once you drive it a while without it.
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